Hello I have a org file that I want to export either to 1. Regular latex or 2. To beamer. So I just use the corresponding export engines. However the following minimal example puzzles me: #+begin_src # -*- org-confirm-babel-evaluate: nil -*- #+LATEX_HEADER_EXTRA: \usepackage{booktabs} * The algorithm applied to the Lane-Emden equation :PROPERTIES: :BEAMER_env: frame :BEAMER_opt: allowframebreaks :END: ** The original Lane-Emden equation #+begin_src latex :results latex replace :exports results :eval t \begin{equation*} \begin{cases} y''(x)+\frac{2}{x}y'(x)+y^{n} &=0\\ y(0) &= 1\\ y'(0) &=0 \end{cases} \end{equation*} where $n\in[0,5]$ is the polytropic index. #+end_src #+end_src Because it exports to #+begin_src \begin{frame}[allowframebreaks]{The SLM algorithm applied to the Lane-Emden equation} \begin{block}{The original Lane-Emden equation} \begin{equation*} y''(x)+\frac{2}{x}y'(x)+y^{n} &=0\\ y(0) &= 1\\ y'(0) &=0 \end{equation*} where $n\in[0,5]$ is the polytropic index. \end{block} \end{frame} #+end_src How can I avoid this annoying block environment? Regards Uwe Brauer

```
>>>>> Uwe Brauer <oub@mat.ucm.es> writes:
> Hello I have a org file that I want to export either to
> 1. Regular latex or
> 2. To beamer.
> So I just use the corresponding export engines.
> However the following minimal example puzzles me:
> #+begin_src
> # -*- org-confirm-babel-evaluate: nil -*- #+LATEX_HEADER_EXTRA:
> \usepackage{booktabs}
> * The algorithm applied to the Lane-Emden equation :PROPERTIES:
> :BEAMER_env: frame :BEAMER_opt: allowframebreaks :END:
> ** The original Lane-Emden equation
> #+begin_src latex :results latex replace :exports results :eval t
> \begin{equation*} \begin{cases} y''(x)+\frac{2}{x}y'(x)+y^{n}
> &=0\\ y(0) &= 1\\ y'(0) &=0 \end{cases} \end{equation*} where
> $n\in[0,5]$ is the polytropic index. #+end_src
> #+end_src
> Because it exports to
> #+begin_src \begin{frame}[allowframebreaks]{The SLM algorithm
> applied to the Lane-Emden equation} \begin{block}{The original
> Lane-Emden equation} \begin{equation*}
> y''(x)+\frac{2}{x}y'(x)+y^{n} &=0\\ y(0) &= 1\\ y'(0) &=0
> \end{equation*} where $n\in[0,5]$ is the polytropic index.
> \end{block} \end{frame}
> #+end_src
> How can I avoid this annoying block environment?
> Regards
> Uwe Brauer
Try \[ in place of \begin{equation*}; \] in place of \end{equation*}
```

[-- Attachment #1: Type: text/plain, Size: 1930 bytes --] >>> "CB" == Colin Baxter <m43cap@yandex.com> writes: >>>>>> Uwe Brauer <oub@mat.ucm.es> writes: >> Hello I have a org file that I want to export either to >> 1. Regular latex or >> 2. To beamer. >> So I just use the corresponding export engines. >> However the following minimal example puzzles me: >> #+begin_src >> # -*- org-confirm-babel-evaluate: nil -*- #+LATEX_HEADER_EXTRA: >> \usepackage{booktabs} >> * The algorithm applied to the Lane-Emden equation :PROPERTIES: >> :BEAMER_env: frame :BEAMER_opt: allowframebreaks :END: >> ** The original Lane-Emden equation >> #+begin_src latex :results latex replace :exports results :eval t >> \begin{equation*} \begin{cases} y''(x)+\frac{2}{x}y'(x)+y^{n} >> &=0\\ y(0) &= 1\\ y'(0) &=0 \end{cases} \end{equation*} where >> $n\in[0,5]$ is the polytropic index. #+end_src >> #+end_src >> Because it exports to >> #+begin_src \begin{frame}[allowframebreaks]{The SLM algorithm >> applied to the Lane-Emden equation} \begin{block}{The original >> Lane-Emden equation} \begin{equation*} >> y''(x)+\frac{2}{x}y'(x)+y^{n} &=0\\ y(0) &= 1\\ y'(0) &=0 >> \end{equation*} where $n\in[0,5]$ is the polytropic index. >> \end{block} \end{frame} >> #+end_src >> How can I avoid this annoying block environment? >> Regards >> Uwe Brauer > Try \[ in place of \begin{equation*}; \] in place of \end{equation*} Thanks I also found out that the * The ... algorithm applied to the Lane-Emden equation :PROPERTIES: :BEAMER_env: frame :BEAMER_opt: allowframebreaks :END: * The original Lane-Emden equation #+begin_src latex :results latex replace :exports results :eval t \begin{equation*} \begin{cases} y''(x)+\frac{2}{x}y'(x)+y^{n} &=0\\ y(0) &= 1\\ y'(0) &=0 \end{cases} \end{equation*} where $n\in[0,5]$ is the polytropic index. #+end_src Works fine, that is changing ** to * [-- Attachment #2: smime.p7s --] [-- Type: application/pkcs7-signature, Size: 5673 bytes --]

```
On Thursday, 15 Oct 2020 at 19:44, Uwe Brauer wrote:
> How can I avoid this annoying block environment?
I know you have sort of solved this (by promoting the headline to a
higher level) but the question I would have asked is: what did you want
the export engine to do with a subheading?
In beamer, org assumes that a subheading starts some kind of block and
the default is just a basic block. You can change this to other types
or have org ignore the actual headline. I use the latter to provide
some structure to the org file without affecting the output.
--
: Eric S Fraga via Emacs 28.0.50, Org release_9.4-57-g8402c4
```

[-- Attachment #1: Type: text/plain, Size: 1125 bytes --] >>> "ESF" == Eric S Fraga <e.fraga@ucl.ac.uk> writes: > On Thursday, 15 Oct 2020 at 19:44, Uwe Brauer wrote: >> How can I avoid this annoying block environment? > I know you have sort of solved this (by promoting the headline to a > higher level) but the question I would have asked is: what did you want > the export engine to do with a subheading? Well because this is how I would have written it starting directly in Latex. Subsections help me to organize the documents, so I thought subheadings would be converted to subsections, without interfering with blocks. So I have learned something I did not know before. > In beamer, org assumes that a subheading starts some kind of block and > the default is just a basic block. Ok I did not know that. I have to admit I use org mode, either because of its excellent table editor, or if I want to export text+some code to LaTeX > You can change this to other types or have org ignore the actual > headline. I use the latter to provide some structure to the org file > without affecting the output. I think I have to learn more about that. [-- Attachment #2: smime.p7s --] [-- Type: application/pkcs7-signature, Size: 5673 bytes --]

```
On Friday, 16 Oct 2020 at 18:06, Uwe Brauer wrote:
> I think I have to learn more about that.
A good starting point to learn what is possible in org for beamer export
is to turn on beamer mode:
#+startup: beamer
This provides, in particular, one key binding (C-c C-b) which allows you
to change the interpretation of a subheading. It pops up a menu of
options.
--
: Eric S Fraga via Emacs 28.0.50, Org release_9.4-57-g8402c4
```

[-- Attachment #1: Type: text/plain, Size: 489 bytes --] >>> "ESF" == Eric S Fraga <e.fraga@ucl.ac.uk> writes: > On Friday, 16 Oct 2020 at 18:06, Uwe Brauer wrote: >> I think I have to learn more about that. > A good starting point to learn what is possible in org for beamer export > is to turn on beamer mode: > #+startup: beamer > This provides, in particular, one key binding (C-c C-b) which allows you > to change the interpretation of a subheading. It pops up a menu of > options. Thanks! Org mode still surprises me. [-- Attachment #2: smime.p7s --] [-- Type: application/pkcs7-signature, Size: 5673 bytes --]